makreloufleila0-coder/GERD-Surface-Analysis-Using-GIS-GEE

Spatial analysis of Ethiopian Renaissance Dam using Google Earth Engine and ArcGIS # Spatial Analysis of the Grand Ethiopian Renaissance Dam (GERD) 🌊 ## Overview This project provides a comprehensive spatial analysis of the **Grand Ethiopian Renaissance Dam (GERD)** using Remote Sensing and GIS techniques. The study monitors environmental changes, water surface area, and vegetation health during various filling stages (2019-2024). ## Key Features 🛰️ * **Satellite Imagery:** Landsat 8 & Sentinel-2 data. * **Spectral Indices:** NDVI (Vegetation),and NDWI (Water). * **Tools:** Google Earth Engine (GEE) for processing & ArcGIS Pro for visualization. ## Detailed Results & Findings (2019 - 2024) 📊 The study compared the environmental state before filling (**2019**) and after filling (**2024**): * **🌿 Vegetation (NDVI):** Mean index improved from **0.31** to **0.38** (+22%). While some areas were flooded, the remaining riparian vegetation became denser. * **💧 Water Surface (NDWI):** Maximum water index rose from **0.64** to **0.81** (+26%), confirming significant reservoir expansion. * **🏁 Conclusion:** The reservoir caused a dual transformation: loss of terrestrial cover in flooded zones, but improved vegetation health in the surrounding areas. --- ## 🗺️ Interactive Content ### ArcGIS StoryMap Explore the full interactive study and high-resolution maps here: 👉 **View the GERD Analysis StoryMap** --- ## 👤 Author **MAKRELOUF LEILA** 🎓 **MSc in Water & Environment** 📍 Based in Algeria | Remote Sensing & GIS Specialist ### Connect with me: